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6dcc5627f6
These are all functions which are invoked from elsewhere, so annotate them as global using the new SYM_FUNC_START and their ENDPROC's by SYM_FUNC_END. Make sure ENTRY/ENDPROC is not defined on X86_64, given these were the last users. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> [hibernate] Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> [xen bits] Acked-by: Herbert Xu <herbert@gondor.apana.org.au> [crypto] Cc: Allison Randal <allison@lohutok.net> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Andy Shevchenko <andy@infradead.org> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Armijn Hemel <armijn@tjaldur.nl> Cc: Cao jin <caoj.fnst@cn.fujitsu.com> Cc: Darren Hart <dvhart@infradead.org> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Enrico Weigelt <info@metux.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jim Mattson <jmattson@google.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: kvm ML <kvm@vger.kernel.org> Cc: Len Brown <len.brown@intel.com> Cc: linux-arch@vger.kernel.org Cc: linux-crypto@vger.kernel.org Cc: linux-efi <linux-efi@vger.kernel.org> Cc: linux-efi@vger.kernel.org Cc: linux-pm@vger.kernel.org Cc: Mark Rutland <mark.rutland@arm.com> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: Peter Zijlstra <peterz@infradead.org> Cc: platform-driver-x86@vger.kernel.org Cc: "Radim Krčmář" <rkrcmar@redhat.com> Cc: Sean Christopherson <sean.j.christopherson@intel.com> Cc: Stefano Stabellini <sstabellini@kernel.org> Cc: "Steven Rostedt (VMware)" <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: Wanpeng Li <wanpengli@tencent.com> Cc: Wei Huang <wei@redhat.com> Cc: x86-ml <x86@kernel.org> Cc: xen-devel@lists.xenproject.org Cc: Xiaoyao Li <xiaoyao.li@linux.intel.com> Link: https://lkml.kernel.org/r/20191011115108.12392-25-jslaby@suse.cz
107 lines
2.2 KiB
ArmAsm
107 lines
2.2 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* __put_user functions.
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*
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* (C) Copyright 2005 Linus Torvalds
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* (C) Copyright 2005 Andi Kleen
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* (C) Copyright 2008 Glauber Costa
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*
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* These functions have a non-standard call interface
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* to make them more efficient, especially as they
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* return an error value in addition to the "real"
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* return value.
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*/
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#include <linux/linkage.h>
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#include <asm/thread_info.h>
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#include <asm/errno.h>
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#include <asm/asm.h>
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#include <asm/smap.h>
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#include <asm/export.h>
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/*
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* __put_user_X
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*
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* Inputs: %eax[:%edx] contains the data
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* %ecx contains the address
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*
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* Outputs: %eax is error code (0 or -EFAULT)
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*
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* These functions should not modify any other registers,
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* as they get called from within inline assembly.
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*/
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#define ENTER mov PER_CPU_VAR(current_task), %_ASM_BX
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.text
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SYM_FUNC_START(__put_user_1)
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ENTER
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cmp TASK_addr_limit(%_ASM_BX),%_ASM_CX
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jae .Lbad_put_user
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ASM_STAC
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1: movb %al,(%_ASM_CX)
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xor %eax,%eax
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ASM_CLAC
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ret
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SYM_FUNC_END(__put_user_1)
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EXPORT_SYMBOL(__put_user_1)
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SYM_FUNC_START(__put_user_2)
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ENTER
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mov TASK_addr_limit(%_ASM_BX),%_ASM_BX
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sub $1,%_ASM_BX
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cmp %_ASM_BX,%_ASM_CX
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jae .Lbad_put_user
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ASM_STAC
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2: movw %ax,(%_ASM_CX)
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xor %eax,%eax
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ASM_CLAC
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ret
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SYM_FUNC_END(__put_user_2)
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EXPORT_SYMBOL(__put_user_2)
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SYM_FUNC_START(__put_user_4)
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ENTER
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mov TASK_addr_limit(%_ASM_BX),%_ASM_BX
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sub $3,%_ASM_BX
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cmp %_ASM_BX,%_ASM_CX
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jae .Lbad_put_user
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ASM_STAC
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3: movl %eax,(%_ASM_CX)
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xor %eax,%eax
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ASM_CLAC
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ret
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SYM_FUNC_END(__put_user_4)
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EXPORT_SYMBOL(__put_user_4)
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SYM_FUNC_START(__put_user_8)
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ENTER
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mov TASK_addr_limit(%_ASM_BX),%_ASM_BX
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sub $7,%_ASM_BX
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cmp %_ASM_BX,%_ASM_CX
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jae .Lbad_put_user
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ASM_STAC
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4: mov %_ASM_AX,(%_ASM_CX)
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#ifdef CONFIG_X86_32
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5: movl %edx,4(%_ASM_CX)
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#endif
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xor %eax,%eax
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ASM_CLAC
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RET
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SYM_FUNC_END(__put_user_8)
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EXPORT_SYMBOL(__put_user_8)
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SYM_CODE_START_LOCAL(.Lbad_put_user_clac)
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ASM_CLAC
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.Lbad_put_user:
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movl $-EFAULT,%eax
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RET
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SYM_CODE_END(.Lbad_put_user_clac)
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_ASM_EXTABLE_UA(1b, .Lbad_put_user_clac)
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_ASM_EXTABLE_UA(2b, .Lbad_put_user_clac)
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_ASM_EXTABLE_UA(3b, .Lbad_put_user_clac)
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_ASM_EXTABLE_UA(4b, .Lbad_put_user_clac)
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#ifdef CONFIG_X86_32
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_ASM_EXTABLE_UA(5b, .Lbad_put_user_clac)
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#endif
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